| 时效制度对AA6156铝合金拉伸性能和断裂韧性的影响 |
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| 引用本文： | 钟 警,郑子樵,佘玲娟,李红萍,吴秋萍.时效制度对AA6156铝合金拉伸性能和断裂韧性的影响[J].稀有金属材料与工程,2013,42(8):2163-2168. |
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| 作者姓名： | 钟 警 郑子樵 佘玲娟 李红萍 吴秋萍 |
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| 作者单位： | 西北有色金属研究院，陕西 西安 710016;西北有色金属研究院，陕西 西安 710016;西北有色金属研究院，陕西 西安 710016;中国核动力研究设计院，四川 成都 610000;西北有色金属研究院，陕西 西安 710016;西北有色金属研究院，陕西 西安 710016;西北有色金属研究院，陕西 西安 710016 |
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| 基金项目： | 国家重点基础研究发展规划资助项目 (2005CB623705) |
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| 摘 要： | 研究了NZ2锆合金板材在不同温度、不同浓度的碘蒸气中的力学行为，并进一步通过扫描电镜观察其断口形貌。结果表明，试验温度为400 ℃，其发生应力腐蚀的临界碘蒸气压约为102 Pa；横向试样较轧向试样更具应力腐蚀敏感性；温度升高能够促进裂纹尖端的应力释放，有利于碘能被更有效地吸附到裂纹尖端，加快对锆合金的腐蚀作用，从而降低了应力腐蚀的临界碘浓度。在高温碘蒸气中，断口腐蚀产物主要为锆的氧化物；虽然碘蒸气对锆有较强的腐蚀作用，但是不足以穿透其表面的保护膜，而局部变形则可以促进碘对金属锆的腐蚀。
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| 关 键 词： | NZ2 热轧 碘致应力腐蚀 |
Effects of Aging Treatments on Tensile Properties and Fracture Toughness of AA6156 Aluminum Alloy |
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| Zhong Jing,Zheng Ziqiao,She Lingjuan,Li Hongping and Wu Qiuping.Effects of Aging Treatments on Tensile Properties and Fracture Toughness of AA6156 Aluminum Alloy[J].Rare Metal Materials and Engineering,2013,42(8):2163-2168. |
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| Authors: | Zhong Jing Zheng Ziqiao She Lingjuan Li Hongping and Wu Qiuping |
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| Affiliation: | Central South University, Changsha 410083, China;Central South University, Changsha 410083, China;Central South University, Changsha 410083, China;Shanghai Aircraft Design and Research Institute, Shanghai 200232, China;Shanghai Aircraft Design and Research Institute, Shanghai 200232, China |
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| Abstract: | The mechanical properties of NZ2 zirconium alloy sheets were investigated in different-concentration iodine stream at different temperatures. The fracture morphology was also observed by SEM. Results show that the critical iodine stream pressure for stress corrosion of NZ2 alloy is 102 Pa at 400 °C. The cross rolling samples has better stress corrosion sensitivity. Temperature increase can accelerate the stress release of crack tips and it is good for effective absorption of iodine to crack tips. Therefore corrosion of the alloys becomes more serious and the critical iodine concentration is decreased. In the high-temperature iodine stream, the main corrosion products are oxides of Zr. Although iodine stream can heavily corrode the Zr alloys, it can not penetrate through its protective film on the surface. However, local deformation can accelerate the corrosion of Zr by iodine |
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| Keywords: | NZ2 hot rolling iodine-induced stress corrosion |
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